Hi Newturn,
It is normal to be nervous mate, it all depends on the type of person you are with regard to how you approach your preparation. I needed to research, research, watch, read etc...my personality!
My wife said she would just give herself over and wait to wake up...uh uh not me.
I think you have to balance your decision, if you have got the best surgeon and you are physically and mentally fit, then what more can you do, I remember nearly cancelling twice, thinking I can wait another six months, but I also remember being really calm the morning of my operation and ready for better things to come.
It is easy to advise you to relax, were on the other side now, this is major surgery and yes complications can happen but they are rare thankfully, and remind yourself why you are doing this....because life is pretty crap living with bone on bone.
I wish you well and think good thoughts mate....look forward to speaking to you on the other side.
Best wishes
Terry